Both the brain and the spinal cord are protected by bone: the brain by the bones of the skull, and the spinal cord by the set of ring-shaped bones called vertebrae that make up the spine. They're both cushioned by layers of membranes called meninges (pronounced: muh-nin-jeez) as well as a special fluid called cerebrospinal fluid. This fluid helps protect the nerve tissue, keep it healthy, and remove waste products.
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Pushing your brain to new heights help to keep it healthy.
强迫你的大脑到达新的高度有助于使它保持健康。
We all know how to keep the body healthy and how to keep it healthy, right?
我们都知道怎样保持身体的健康还有怎样保持牙齿卫生，对不对？
This fluid helps protect the nerve tissue, keep it healthy, and remove waste products.
脑脊液保护着神经组织，维持着它的健康，并去除废弃产物。
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